It is reported that the Germans have developed a 70-kilogram (155-pound) HE
bomb with a medium-thick casing. This bomb is intended to replace
the SC* and SD** 50-kilogram (110-pound) general-purpose HE bombs. The
wall-thickness of the new bomb is 10 mm (about 0.3 in), and the filling
21 kilograms (46 pounds) of TNT. The blast effect is reportedly as great as that
of the SC 50-kilogram, and the fragmentation greater than that of
the SD 50-kilogram. The fin assembly and external dimensions of
the 70-kilogram being the same as the SC 50-kilogram, the
same bomb rack can be used.
* SC is the designation for the bomb with a thin casing, which achieves its effect chiefly by blast.
** SD is the designation for the bomb with a thick casing, which achieves its effect
chiefly by fragmentation. The SD has greater penetrating power than the SC, and
was designed for attack on modern reinforced concrete structures.